I think the question of the existence of god or the concept of god should not be treated under the sciences, sciences taken broadly, but should be left in the purview of metaphysicians and at the very best theologians. The only reason I see why anything god should occupy the domain of science is when theologians claim that god does act or cause somethings to act in a certain way in the universe which I still think is granting them too much.
Time, I think, has come to honestly tell theologians that the word god was used as answer when man was deeply ignorant of causes that affected him, that each man fashioned his god in proportion to his imagination. The savage fashioned his god after things he could see such as serpents, stones, sun and so on. The sophisticated theologian fashioned his god around imagination. He made his god a giant after human qualities or a negation of this qualities. He, in every stop, made his god non existent through the qualities he gave him, in fact, it can be said without fear of contradiction, that the theologian is the true atheist. He annihilates his god whenever he begins to talk about it.
I contend that if we really are honest with ourselves and the theologians, no gods exist. In fact, looking at the Dawkins' spectrum for theistic probability, it is not arrogant to claim a 7.